1 //! Functions dealing with attributes and meta items
6 cfg_matches, contains_feature_attr, eval_condition, find_crate_name, find_deprecation,
7 find_repr_attrs, find_stability, find_unwind_attr, Deprecation, InlineAttr, OptimizeAttr,
8 IntType, ReprAttr, RustcDeprecation, Stability, StabilityLevel, UnwindAttr,
12 pub use StabilityLevel::*;
15 use crate::ast::{AttrId, Attribute, AttrStyle, Name, Ident, Path, PathSegment};
16 use crate::ast::{MetaItem, MetaItemKind, NestedMetaItem, NestedMetaItemKind};
17 use crate::ast::{Lit, LitKind, Expr, ExprKind, Item, Local, Stmt, StmtKind, GenericParam};
18 use crate::mut_visit::visit_clobber;
19 use crate::source_map::{BytePos, Spanned, respan, dummy_spanned};
20 use crate::parse::lexer::comments::{doc_comment_style, strip_doc_comment_decoration};
21 use crate::parse::parser::Parser;
22 use crate::parse::{self, ParseSess, PResult};
23 use crate::parse::token::{self, Token};
25 use crate::symbol::Symbol;
27 use crate::tokenstream::{TokenStream, TokenTree, DelimSpan};
31 use syntax_pos::{FileName, Span};
34 use std::ops::DerefMut;
36 pub fn mark_used(attr: &Attribute) {
37 debug!("Marking {:?} as used.", attr);
38 GLOBALS.with(|globals| {
39 globals.used_attrs.lock().insert(attr.id);
43 pub fn is_used(attr: &Attribute) -> bool {
44 GLOBALS.with(|globals| {
45 globals.used_attrs.lock().contains(attr.id)
49 pub fn mark_known(attr: &Attribute) {
50 debug!("Marking {:?} as known.", attr);
51 GLOBALS.with(|globals| {
52 globals.known_attrs.lock().insert(attr.id);
56 pub fn is_known(attr: &Attribute) -> bool {
57 GLOBALS.with(|globals| {
58 globals.known_attrs.lock().contains(attr.id)
62 pub fn is_known_lint_tool(m_item: Ident) -> bool {
63 ["clippy"].contains(&m_item.as_str().as_ref())
67 /// Returns the MetaItem if self is a NestedMetaItemKind::MetaItem.
68 pub fn meta_item(&self) -> Option<&MetaItem> {
70 NestedMetaItemKind::MetaItem(ref item) => Some(item),
75 /// Returns the Lit if self is a NestedMetaItemKind::Literal.
76 pub fn literal(&self) -> Option<&Lit> {
78 NestedMetaItemKind::Literal(ref lit) => Some(lit),
83 /// Returns the Span for `self`.
84 pub fn span(&self) -> Span {
88 /// Returns `true` if this list item is a MetaItem with a name of `name`.
89 pub fn check_name(&self, name: &str) -> bool {
90 self.meta_item().map_or(false, |meta_item| meta_item.check_name(name))
93 /// Returns the name of the meta item, e.g., `foo` in `#[foo]`,
94 /// `#[foo="bar"]` and `#[foo(bar)]`, if self is a MetaItem
95 pub fn name(&self) -> Option<Name> {
96 self.meta_item().and_then(|meta_item| Some(meta_item.name()))
99 /// Gets the string value if self is a MetaItem and the MetaItem is a
100 /// MetaItemKind::NameValue variant containing a string, otherwise None.
101 pub fn value_str(&self) -> Option<Symbol> {
102 self.meta_item().and_then(|meta_item| meta_item.value_str())
105 /// Returns a name and single literal value tuple of the MetaItem.
106 pub fn name_value_literal(&self) -> Option<(Name, &Lit)> {
107 self.meta_item().and_then(
108 |meta_item| meta_item.meta_item_list().and_then(
110 if meta_item_list.len() == 1 {
111 let nested_item = &meta_item_list[0];
112 if nested_item.is_literal() {
113 Some((meta_item.name(), nested_item.literal().unwrap()))
123 /// Returns a MetaItem if self is a MetaItem with Kind Word.
124 pub fn word(&self) -> Option<&MetaItem> {
125 self.meta_item().and_then(|meta_item| if meta_item.is_word() {
132 /// Gets a list of inner meta items from a list MetaItem type.
133 pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
134 self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
137 /// Returns `true` if the variant is MetaItem.
138 pub fn is_meta_item(&self) -> bool {
139 self.meta_item().is_some()
142 /// Returns `true` if the variant is Literal.
143 pub fn is_literal(&self) -> bool {
144 self.literal().is_some()
147 /// Returns `true` if self is a MetaItem and the meta item is a word.
148 pub fn is_word(&self) -> bool {
149 self.word().is_some()
152 /// Returns `true` if self is a MetaItem and the meta item is a ValueString.
153 pub fn is_value_str(&self) -> bool {
154 self.value_str().is_some()
157 /// Returns `true` if self is a MetaItem and the meta item is a list.
158 pub fn is_meta_item_list(&self) -> bool {
159 self.meta_item_list().is_some()
163 fn name_from_path(path: &Path) -> Name {
164 path.segments.last().expect("empty path in attribute").ident.name
168 /// Returns `true` if the attribute's path matches the argument. If it matches, then the
169 /// attribute is marked as used.
171 /// To check the attribute name without marking it used, use the `path` field directly.
172 pub fn check_name(&self, name: &str) -> bool {
173 let matches = self.path == name;
180 /// Returns the **last** segment of the name of this attribute.
181 /// e.g., `foo` for `#[foo]`, `skip` for `#[rustfmt::skip]`.
182 pub fn name(&self) -> Name {
183 name_from_path(&self.path)
186 pub fn value_str(&self) -> Option<Symbol> {
187 self.meta().and_then(|meta| meta.value_str())
190 pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
192 Some(MetaItem { node: MetaItemKind::List(list), .. }) => Some(list),
197 pub fn is_word(&self) -> bool {
198 self.path.segments.len() == 1 && self.tokens.is_empty()
201 pub fn span(&self) -> Span {
205 pub fn is_meta_item_list(&self) -> bool {
206 self.meta_item_list().is_some()
209 /// Indicates if the attribute is a Value String.
210 pub fn is_value_str(&self) -> bool {
211 self.value_str().is_some()
216 pub fn name(&self) -> Name {
217 name_from_path(&self.ident)
220 // #[attribute(name = "value")]
222 pub fn name_value_literal(&self) -> Option<&Lit> {
224 MetaItemKind::NameValue(v) => Some(v),
229 pub fn value_str(&self) -> Option<Symbol> {
231 MetaItemKind::NameValue(ref v) => {
233 LitKind::Str(ref s, _) => Some(*s),
241 pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
243 MetaItemKind::List(ref l) => Some(&l[..]),
248 pub fn is_word(&self) -> bool {
250 MetaItemKind::Word => true,
255 pub fn span(&self) -> Span { self.span }
257 pub fn check_name(&self, name: &str) -> bool {
261 pub fn is_value_str(&self) -> bool {
262 self.value_str().is_some()
265 pub fn is_meta_item_list(&self) -> bool {
266 self.meta_item_list().is_some()
269 pub fn is_scoped(&self) -> Option<Ident> {
270 if self.ident.segments.len() > 1 {
271 Some(self.ident.segments[0].ident)
279 /// Extracts the MetaItem from inside this Attribute.
280 pub fn meta(&self) -> Option<MetaItem> {
281 let mut tokens = self.tokens.trees().peekable();
283 ident: self.path.clone(),
284 node: if let Some(node) = MetaItemKind::from_tokens(&mut tokens) {
285 if tokens.peek().is_some() {
296 pub fn parse<'a, T, F>(&self, sess: &'a ParseSess, mut f: F) -> PResult<'a, T>
297 where F: FnMut(&mut Parser<'a>) -> PResult<'a, T>,
299 let mut parser = Parser::new(sess, self.tokens.clone(), None, false, false);
300 let result = f(&mut parser)?;
301 if parser.token != token::Eof {
302 parser.unexpected()?;
307 pub fn parse_list<'a, T, F>(&self, sess: &'a ParseSess, mut f: F) -> PResult<'a, Vec<T>>
308 where F: FnMut(&mut Parser<'a>) -> PResult<'a, T>,
310 if self.tokens.is_empty() {
311 return Ok(Vec::new());
313 self.parse(sess, |parser| {
314 parser.expect(&token::OpenDelim(token::Paren))?;
315 let mut list = Vec::new();
316 while !parser.eat(&token::CloseDelim(token::Paren)) {
317 list.push(f(parser)?);
318 if !parser.eat(&token::Comma) {
319 parser.expect(&token::CloseDelim(token::Paren))?;
327 pub fn parse_meta<'a>(&self, sess: &'a ParseSess) -> PResult<'a, MetaItem> {
329 ident: self.path.clone(),
330 node: self.parse(sess, |parser| parser.parse_meta_item_kind())?,
335 /// Converts self to a normal #[doc="foo"] comment, if it is a
336 /// comment like `///` or `/** */`. (Returns self unchanged for
337 /// non-sugared doc attributes.)
338 pub fn with_desugared_doc<T, F>(&self, f: F) -> T where
339 F: FnOnce(&Attribute) -> T,
341 if self.is_sugared_doc {
342 let comment = self.value_str().unwrap();
343 let meta = mk_name_value_item_str(
344 Ident::from_str("doc"),
345 dummy_spanned(Symbol::intern(&strip_doc_comment_decoration(&comment.as_str()))));
346 let mut attr = if self.style == ast::AttrStyle::Outer {
347 mk_attr_outer(self.span, self.id, meta)
349 mk_attr_inner(self.span, self.id, meta)
351 attr.is_sugared_doc = true;
361 pub fn mk_name_value_item_str(ident: Ident, value: Spanned<Symbol>) -> MetaItem {
362 let value = respan(value.span, LitKind::Str(value.node, ast::StrStyle::Cooked));
363 mk_name_value_item(ident.span.to(value.span), ident, value)
366 pub fn mk_name_value_item(span: Span, ident: Ident, value: ast::Lit) -> MetaItem {
367 MetaItem { ident: Path::from_ident(ident), span, node: MetaItemKind::NameValue(value) }
370 pub fn mk_list_item(span: Span, ident: Ident, items: Vec<NestedMetaItem>) -> MetaItem {
371 MetaItem { ident: Path::from_ident(ident), span, node: MetaItemKind::List(items) }
374 pub fn mk_word_item(ident: Ident) -> MetaItem {
375 MetaItem { ident: Path::from_ident(ident), span: ident.span, node: MetaItemKind::Word }
378 pub fn mk_nested_word_item(ident: Ident) -> NestedMetaItem {
379 respan(ident.span, NestedMetaItemKind::MetaItem(mk_word_item(ident)))
382 pub fn mk_attr_id() -> AttrId {
383 use std::sync::atomic::AtomicUsize;
384 use std::sync::atomic::Ordering;
386 static NEXT_ATTR_ID: AtomicUsize = AtomicUsize::new(0);
388 let id = NEXT_ATTR_ID.fetch_add(1, Ordering::SeqCst);
389 assert!(id != ::std::usize::MAX);
393 /// Returns an inner attribute with the given value.
394 pub fn mk_attr_inner(span: Span, id: AttrId, item: MetaItem) -> Attribute {
395 mk_spanned_attr_inner(span, id, item)
398 /// Returns an inner attribute with the given value and span.
399 pub fn mk_spanned_attr_inner(sp: Span, id: AttrId, item: MetaItem) -> Attribute {
402 style: ast::AttrStyle::Inner,
404 tokens: item.node.tokens(item.span),
405 is_sugared_doc: false,
410 /// Returns an outer attribute with the given value.
411 pub fn mk_attr_outer(span: Span, id: AttrId, item: MetaItem) -> Attribute {
412 mk_spanned_attr_outer(span, id, item)
415 /// Returns an outer attribute with the given value and span.
416 pub fn mk_spanned_attr_outer(sp: Span, id: AttrId, item: MetaItem) -> Attribute {
419 style: ast::AttrStyle::Outer,
421 tokens: item.node.tokens(item.span),
422 is_sugared_doc: false,
427 pub fn mk_sugared_doc_attr(id: AttrId, text: Symbol, span: Span) -> Attribute {
428 let style = doc_comment_style(&text.as_str());
429 let lit = respan(span, LitKind::Str(text, ast::StrStyle::Cooked));
433 path: Path::from_ident(Ident::from_str("doc").with_span_pos(span)),
434 tokens: MetaItemKind::NameValue(lit).tokens(span),
435 is_sugared_doc: true,
440 pub fn list_contains_name(items: &[NestedMetaItem], name: &str) -> bool {
441 items.iter().any(|item| {
442 item.check_name(name)
446 pub fn contains_name(attrs: &[Attribute], name: &str) -> bool {
447 attrs.iter().any(|item| {
448 item.check_name(name)
452 pub fn find_by_name<'a>(attrs: &'a [Attribute], name: &str) -> Option<&'a Attribute> {
453 attrs.iter().find(|attr| attr.check_name(name))
456 pub fn filter_by_name<'a>(attrs: &'a [Attribute], name: &'a str)
457 -> impl Iterator<Item = &'a Attribute> {
458 attrs.iter().filter(move |attr| attr.check_name(name))
461 pub fn first_attr_value_str_by_name(attrs: &[Attribute], name: &str) -> Option<Symbol> {
463 .find(|at| at.check_name(name))
464 .and_then(|at| at.value_str())
468 fn tokens(&self) -> TokenStream {
469 let mut idents = vec![];
470 let mut last_pos = BytePos(0 as u32);
471 for (i, segment) in self.ident.segments.iter().enumerate() {
472 let is_first = i == 0;
474 let mod_sep_span = Span::new(last_pos,
475 segment.ident.span.lo(),
476 segment.ident.span.ctxt());
477 idents.push(TokenTree::Token(mod_sep_span, Token::ModSep).into());
479 idents.push(TokenTree::Token(segment.ident.span,
480 Token::from_ast_ident(segment.ident)).into());
481 last_pos = segment.ident.span.hi();
483 self.node.tokens(self.span).append_to_tree_and_joint_vec(&mut idents);
484 TokenStream::new(idents)
487 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItem>
488 where I: Iterator<Item = TokenTree>,
490 // FIXME: Share code with `parse_path`.
491 let ident = match tokens.next() {
492 Some(TokenTree::Token(span, token @ Token::Ident(..))) |
493 Some(TokenTree::Token(span, token @ Token::ModSep)) => 'arm: {
494 let mut segments = if let Token::Ident(ident, _) = token {
495 if let Some(TokenTree::Token(_, Token::ModSep)) = tokens.peek() {
497 vec![PathSegment::from_ident(ident.with_span_pos(span))]
499 break 'arm Path::from_ident(ident.with_span_pos(span));
502 vec![PathSegment::path_root(span)]
505 if let Some(TokenTree::Token(span,
506 Token::Ident(ident, _))) = tokens.next() {
507 segments.push(PathSegment::from_ident(ident.with_span_pos(span)));
511 if let Some(TokenTree::Token(_, Token::ModSep)) = tokens.peek() {
517 let span = span.with_hi(segments.last().unwrap().ident.span.hi());
518 Path { span, segments }
520 Some(TokenTree::Token(_, Token::Interpolated(nt))) => match *nt {
521 token::Nonterminal::NtIdent(ident, _) => Path::from_ident(ident),
522 token::Nonterminal::NtMeta(ref meta) => return Some(meta.clone()),
523 token::Nonterminal::NtPath(ref path) => path.clone(),
528 let list_closing_paren_pos = tokens.peek().map(|tt| tt.span().hi());
529 let node = MetaItemKind::from_tokens(tokens)?;
530 let hi = match node {
531 MetaItemKind::NameValue(ref lit) => lit.span.hi(),
532 MetaItemKind::List(..) => list_closing_paren_pos.unwrap_or(ident.span.hi()),
533 _ => ident.span.hi(),
535 let span = ident.span.with_hi(hi);
536 Some(MetaItem { ident, node, span })
541 pub fn tokens(&self, span: Span) -> TokenStream {
543 MetaItemKind::Word => TokenStream::empty(),
544 MetaItemKind::NameValue(ref lit) => {
545 let mut vec = vec![TokenTree::Token(span, Token::Eq).into()];
546 lit.tokens().append_to_tree_and_joint_vec(&mut vec);
547 TokenStream::new(vec)
549 MetaItemKind::List(ref list) => {
550 let mut tokens = Vec::new();
551 for (i, item) in list.iter().enumerate() {
553 tokens.push(TokenTree::Token(span, Token::Comma).into());
555 item.node.tokens().append_to_tree_and_joint_vec(&mut tokens);
557 TokenTree::Delimited(
558 DelimSpan::from_single(span),
560 TokenStream::new(tokens).into(),
566 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItemKind>
567 where I: Iterator<Item = TokenTree>,
569 let delimited = match tokens.peek().cloned() {
570 Some(TokenTree::Token(_, token::Eq)) => {
572 return if let Some(TokenTree::Token(span, token)) = tokens.next() {
573 LitKind::from_token(token)
574 .map(|lit| MetaItemKind::NameValue(Spanned { node: lit, span: span }))
579 Some(TokenTree::Delimited(_, delim, ref tts)) if delim == token::Paren => {
583 _ => return Some(MetaItemKind::Word),
586 let mut tokens = delimited.into_trees().peekable();
587 let mut result = Vec::new();
588 while let Some(..) = tokens.peek() {
589 let item = NestedMetaItemKind::from_tokens(&mut tokens)?;
590 result.push(respan(item.span(), item));
591 match tokens.next() {
592 None | Some(TokenTree::Token(_, Token::Comma)) => {}
596 Some(MetaItemKind::List(result))
600 impl NestedMetaItemKind {
601 fn span(&self) -> Span {
603 NestedMetaItemKind::MetaItem(ref item) => item.span,
604 NestedMetaItemKind::Literal(ref lit) => lit.span,
608 fn tokens(&self) -> TokenStream {
610 NestedMetaItemKind::MetaItem(ref item) => item.tokens(),
611 NestedMetaItemKind::Literal(ref lit) => lit.tokens(),
615 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<NestedMetaItemKind>
616 where I: Iterator<Item = TokenTree>,
618 if let Some(TokenTree::Token(span, token)) = tokens.peek().cloned() {
619 if let Some(node) = LitKind::from_token(token) {
621 return Some(NestedMetaItemKind::Literal(respan(span, node)));
625 MetaItem::from_tokens(tokens).map(NestedMetaItemKind::MetaItem)
630 crate fn tokens(&self) -> TokenStream {
631 TokenTree::Token(self.span, self.node.token()).into()
636 fn token(&self) -> Token {
640 LitKind::Str(string, ast::StrStyle::Cooked) => {
641 let escaped = string.as_str().escape_default().to_string();
642 Token::Literal(token::Lit::Str_(Symbol::intern(&escaped)), None)
644 LitKind::Str(string, ast::StrStyle::Raw(n)) => {
645 Token::Literal(token::Lit::StrRaw(string, n), None)
647 LitKind::ByteStr(ref bytes) => {
648 let string = bytes.iter().cloned().flat_map(ascii::escape_default)
649 .map(Into::<char>::into).collect::<String>();
650 Token::Literal(token::Lit::ByteStr(Symbol::intern(&string)), None)
652 LitKind::Byte(byte) => {
653 let string: String = ascii::escape_default(byte).map(Into::<char>::into).collect();
654 Token::Literal(token::Lit::Byte(Symbol::intern(&string)), None)
656 LitKind::Char(ch) => {
657 let string: String = ch.escape_default().map(Into::<char>::into).collect();
658 Token::Literal(token::Lit::Char(Symbol::intern(&string)), None)
660 LitKind::Int(n, ty) => {
661 let suffix = match ty {
662 ast::LitIntType::Unsigned(ty) => Some(Symbol::intern(ty.ty_to_string())),
663 ast::LitIntType::Signed(ty) => Some(Symbol::intern(ty.ty_to_string())),
664 ast::LitIntType::Unsuffixed => None,
666 Token::Literal(token::Lit::Integer(Symbol::intern(&n.to_string())), suffix)
668 LitKind::Float(symbol, ty) => {
669 Token::Literal(token::Lit::Float(symbol), Some(Symbol::intern(ty.ty_to_string())))
671 LitKind::FloatUnsuffixed(symbol) => Token::Literal(token::Lit::Float(symbol), None),
672 LitKind::Bool(value) => Token::Ident(Ident::with_empty_ctxt(Symbol::intern(if value {
677 LitKind::Err(val) => Token::Literal(token::Lit::Err(val), None),
681 fn from_token(token: Token) -> Option<LitKind> {
683 Token::Ident(ident, false) if ident.name == "true" => Some(LitKind::Bool(true)),
684 Token::Ident(ident, false) if ident.name == "false" => Some(LitKind::Bool(false)),
685 Token::Interpolated(nt) => match *nt {
686 token::NtExpr(ref v) | token::NtLiteral(ref v) => match v.node {
687 ExprKind::Lit(ref lit) => Some(lit.node.clone()),
692 Token::Literal(lit, suf) => {
693 let (suffix_illegal, result) = parse::lit_token(lit, suf, None);
694 if suffix_illegal && suf.is_some() {
704 pub trait HasAttrs: Sized {
705 fn attrs(&self) -> &[ast::Attribute];
706 fn visit_attrs<F: FnOnce(&mut Vec<ast::Attribute>)>(&mut self, f: F);
709 impl<T: HasAttrs> HasAttrs for Spanned<T> {
710 fn attrs(&self) -> &[ast::Attribute] { self.node.attrs() }
711 fn visit_attrs<F: FnOnce(&mut Vec<ast::Attribute>)>(&mut self, f: F) {
712 self.node.visit_attrs(f);
716 impl HasAttrs for Vec<Attribute> {
717 fn attrs(&self) -> &[Attribute] {
720 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
725 impl HasAttrs for ThinVec<Attribute> {
726 fn attrs(&self) -> &[Attribute] {
729 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
730 visit_clobber(self, |this| {
731 let mut vec = this.into();
738 impl<T: HasAttrs + 'static> HasAttrs for P<T> {
739 fn attrs(&self) -> &[Attribute] {
742 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
743 (**self).visit_attrs(f);
747 impl HasAttrs for StmtKind {
748 fn attrs(&self) -> &[Attribute] {
750 StmtKind::Local(ref local) => local.attrs(),
751 StmtKind::Item(..) => &[],
752 StmtKind::Expr(ref expr) | StmtKind::Semi(ref expr) => expr.attrs(),
753 StmtKind::Mac(ref mac) => {
754 let (_, _, ref attrs) = **mac;
760 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
762 StmtKind::Local(local) => local.visit_attrs(f),
763 StmtKind::Item(..) => {}
764 StmtKind::Expr(expr) => expr.visit_attrs(f),
765 StmtKind::Semi(expr) => expr.visit_attrs(f),
766 StmtKind::Mac(mac) => {
767 let (_mac, _style, attrs) = mac.deref_mut();
768 attrs.visit_attrs(f);
774 impl HasAttrs for Stmt {
775 fn attrs(&self) -> &[ast::Attribute] {
779 fn visit_attrs<F: FnOnce(&mut Vec<ast::Attribute>)>(&mut self, f: F) {
780 self.node.visit_attrs(f);
784 impl HasAttrs for GenericParam {
785 fn attrs(&self) -> &[ast::Attribute] {
789 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
790 self.attrs.visit_attrs(f);
794 macro_rules! derive_has_attrs {
795 ($($ty:path),*) => { $(
796 impl HasAttrs for $ty {
797 fn attrs(&self) -> &[Attribute] {
801 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
802 self.attrs.visit_attrs(f);
809 Item, Expr, Local, ast::ForeignItem, ast::StructField, ast::ImplItem, ast::TraitItem, ast::Arm,
810 ast::Field, ast::FieldPat, ast::Variant_
813 pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
814 for raw_attr in attrs {
815 let mut parser = parse::new_parser_from_source_str(
817 FileName::cli_crate_attr_source_code(&raw_attr),
821 let start_span = parser.span;
822 let (path, tokens) = panictry!(parser.parse_meta_item_unrestricted());
823 let end_span = parser.span;
824 if parser.token != token::Eof {
825 parse_sess.span_diagnostic
826 .span_err(start_span.to(end_span), "invalid crate attribute");
830 krate.attrs.push(Attribute {
832 style: AttrStyle::Inner,
835 is_sugared_doc: false,
836 span: start_span.to(end_span),